Fastener inserting machine



3 sheets-sheet 1 E N I m 5 A QA L M l L G A m 3 1l. E T l K mm e S n B mmu d F F wm w l T F S A 3 9 F f/O 1 f/O 39.11 n Y fw a 1 mfr, rl L oo.o. m 4 w ,1v 9 Y 11 6 H l un m m Fni! Inventar March I6, 1948, F, B,KEALL FASTENER INSERTING MACHINE Filed June 13, 1945 3 Sheets-Sheet 2nuenor Manch-, 3948* E, KEALL 2,437,746

FASTENER INSERTING MACHINE Filed June 13, 1945 3 sheets-sheet 3 Invenor'y Frank Kal! his Afton@ Patented Mar.. 16,1948

FASTENER INSERTING MACHINE Frank Bycroft Keall, Leicester, England,assignor to United Shoe Machinery Corporation, Flemington, N. J., acorporation of New Jersey Application June 13, 1945, Serial No. 599,225In Great Britain June 29, 1944 2 Claims. 1

'Ihis invention is concerned with improvements in fastener insertingmachines and is particularly, but by no means exclusively, concernedwith machines organized to separate nails from a bulk of nails in areceptacle of the machine and to insert them one by one into a workpiece.

Herein the term fastener is used as indicating not only an element to beinserted for strictly fastening purposes but also as an element whichmay be inserted for such purpose as wear resistance or ornamentationrather than for fasten- By way of example, but not of limitation of theinvention, there is hereinafter described one convenient construction ofmachine which is provided by the invention and is illustrative thereof,the illustrative machine being a machine adapted for inserting nailsinto shoes and having a work supporting horn, means for separating anail from a raceway containing a row of nails, means for driving theseparated nail and means for feeding the work beneath the nail drivingmeans.

One of the various objects of the present invention is to provide afastener inserting machine which may be operated at relatively highspeed (i. e. about 600 R. P. M., or more) without undue noise.

In accordance with one feature of the invention, the fastener insertingdriver of the illustrative machine is operated by crank mechanisminstead of by a spring and cam as heretofore, enabling the driver to beoperated without undue noise and at an increased rate of speed.Moreover, mechanism is provided for causing the fastener insertingmovement of the driver to be accelerated as compared with the remainderof its movement.

In accordance with another feature of the invention the awl of theillustrative machine is carried on and operated by an arm of substantiallength extending rearwardly of the machine and arranged for movementheightwise and laterally of the machine to cause the awl to pierce thework and t impart feeding movements thereto.

These and other features of the invention will now be described indetail with reference to the accompanying drawings and will be pointedout in the appended claims. l

A fastener inserting machine in which the invention is shown asembodied, is illustrated in various views in the drawings in whichFigure 1 is a front elevation of part of the illustrative machine;

Figure 2 is a section on the line II-II in Figure 1:

Figure 3 is a right hand side elevation of awl operating mechanism ofthe illustrative machine;

Figure 4 is a plan view of the parts shown in Figure 3; and

Figure 5 is a left hand side elevation of nail separator mechanism ofthe illustrative machine.

In the illustrative machine, which is similar to the machine disclosedin United States Letters Patent No. 898,573, granted September 15, 1908,on an application led in the name of George Goddu, the upper end portionof the driver l` is secured by a clamping collar 3 in the lower endportion of a driver carrier 5 and its lower end portion is guided in athroat comprising a nosepiece l and a plate 9, correspondingrespectively to the nosepiece referred to as the nosepiece E and theplate referred to as the plate 4I in said patent, which are secured to aswinging head Il corresponding to the head referred to as the swinginghead B in said patent.

yThe upper end portion of the driver carrier 5, which is a relativelysmall light part, is piv-A otally mounted on a horizontal spindle I3extending forwardly and rearwardly of themachine. The spindle I3 haspivoted on it the right hand end portion of a link l5 which extendsupwardly and to the left from the spindle and at its other end it ispivotally connected at I1 to a crank lever IB. The right hand portion ofthe crank lever I9, at the right of its connection to the link l5, ispivoted on a crank pin 2l secured in the front of an arm 23 secured onthe front end portion of a horizontal cam shaft 25,

extending forwardly and rearwardly of the machine and corresponding tothe shaft referred to as the main shaft C2 in said patent. 'I'he left'hand end portion of the crank leverI I9 has 0n it a cam roll 21 whichextends rearwardly from the lever and engages in a cam groove 29 in acam block 3l secured to the machine frame.

Pivcted on the spindle I3 is a link 33 which is pivotally connected at35 to a radius arm 3ll pivoted at 39 to a bracket 4l secured on theswinging head I'I. The link 33 has secured in it a stud 43 on which isrotatably mounted a roll 45 which engages an arcuate guideway 4l in ablock 49 secured to the swinging head Il.

The driver carrier 5 has projecting from it lugs 5I, 53. A face on thelug 5l may engage a face on a bracket secured to the swinging head lland a face on the lug 53 may engage a face 51 on the swinging head Il.The lugs 5l, 53 and faces on the bracket 55 and swinging head preventdamage to the machine, should the driver break, by uncontrolled swingingmovement'of the driver carrier about the spindle I3. As the cam shaft 25rotates the crank pin 2| causes the cam roll 21 on the crank lever I9 totravel along the cam groove 29 and the arrangement is such that as thecrank pin '2| is approaching its lowest point the cam roll 21 is movingup the cam groove 29 and causes thedownward movement df the driver to beaccfeflera'ted so thata relatively rapid downward movement of the driverwhen a nail is being driven is obtained. A somewhat slower but rapidrise of the driver then occursand when the driver is about in itshighest position the driver remains more or lessstationary until'it. is.

given a rapid downward movement to drive the next nail. The link 33,radius arm 31 andarcuate guideway 41 control the pathotmovemevnt of thespindle I3.

The driver mechanism above described is capable of beiner operated atrelatively high speed without undue noise or wear of the parts.

The a-wl 6|, in the illustrative machine, is secured'bya cap.. 4Seintheforwardend portion of ariawl arm.65. The rear ndportion :of the awlarm ispivtally connected by a universal coupling,toa.bracket,.61.securedto the rear portion of,v H'the machine. `frame.dThe latter universal coupling is positioned'so far rearwardly of theawl that.' up` and down movements of the awl into and-out offtlieworkare. substantially straight iinemovemeiits.`

The; rearend portion of the awl arm $Y is provided. with tworecesseseach arranged to re- Ceiveapart-ballmember. 6.9 anda plate1|secured. byfscrews to the awl arm 65 has formed onit tworecesses eacharrangedtoreceive a partball member 15,l the. part-ballmembers 69 :and

ljbeing in axialalignment ineach instance. Thebracketjfhasafplate-iikeportion 1,1 which isA engaged by the', iiat faces of the. part-bailmembers." Suiliciefntfclearance is provided between. the rear endportionof the awlarm and plate 1| andthe' portion 11 of the bracket 61 to allowtheffront end. portion of. the awl arm to move uplanH downfabout thepart-b'ali-members @9;15

Theplate-like portion 11 of the bracket 61 has secure'dfin it afblociL19Qthe block having extending fromY it. a screw-threaded stem 3|Awhich passes through.' theY plate-like portion 11 and is securedtheretoby. a nut 8.3, The block 19 is positioned between and engaged bytwo part-ball members. B-seated, in. recesses formed in the rearendportionr of- 'the4 awl arm 65.- and a cap 81 secured thereto. The frontendlportion of the awl arm 85 can therefore move laterally of themachine whenthework is fedby the awl about the part-ball members 8 5 andthe rear end portion. of. the Vawl arm may move forwardly and rearwardlyof, the maschine sinceV the part-ball men'1bef1s .`85` can slide on theblock 19. The spaced apart relationshiplof the two sets ofpartbailfmembers E9, 15; prevents twisting of the awl bar. hIt will beapparent that the arrangement at the rear. endportion ofthe awl armprovides the aforesaid universal coupling and that up. and dowuandlateral movements of the front end portion of the front end, portion ofthe awl arm take place aboutpart-ball members.

In order. to cause the awl 6| to move in at least a substantially.straight .path as itis feeding the. work the'a'wl'arm 65 has formed init a spherical recess 89 in which is a ball end 9| of a rod 93. Theball, 9| is held in 'the recess 8,9

by, a cap 95 secured to the awl `arm and having` 11.1. it e Sehen@@asv-leali seeeees treball 9|. The rod 93 is secured in a member 91having a cap 99 secured thereto. The member 91 and cap 99 have formed inthem spherical recesses arranged to receive a ball |0| formed on theupper end of a spindle |03. As the front end portion of the awl arm 65is moved in a direction to feed the worlf'ij. tdthe left viewed from thefront'of the machine, the awl arm swings about the part-ball members andthe member 91 and the rod 93 swing about the ball |61, the :arrangementbeing such that the swinging movemeri'tof the member 91 and rod 93causesthe awl arm `6,5` to move slightly forwardly, thepart-ballmeinbers 85 sliding across the block 19, with th-'result thatthe front end portion of thevawl armandthe awl move in at least asubstantiallystraightpath. The spindle |03 has a stem 05 which issecured by a screw I 91 in a bracket '|09 secured to the machine frame.The stem |05 is eccentric tofthe axis of the ball |0| so. that ifthespindleis rotated by means f a bar thereinthe. frontportion ofA the awlvarm 55 maybe-adjusted toadjllstthe awl relatively to the driver toAcause` during Operation, of the main spherical recesses formed in thefront end ofy the awl arm and acap. |9secured thereto.

The front end; portion ofthe awl arm 65 has secured initja ball-end stud|21 which is engaged by. a. spherical recess formed, partly in the.'lower end portion of. a link |243, and partlyin a'cap" |25 secured tothe ,lower end portion of the, link '|23."

The uppery endfoi the link is connected to a baliended stud |21 securedIin :an arm |29, which Corresp/nds to the sector, referred to as" thetoothed sector fi-k in the abovermentioned patent, the arm being.securetonashaft |31, corresponding to. the shaft. referred to as the,rockshaft f4 in Said patent andfisperatedin the same manneras the lastmentioned.shaft..V The ball-ended stud |21 has a stem |33 which issecured in the arm |29 Iand is eccentric to the ball so that byrotatingl the stud 21 the heightwise position ofthe. awl;l 6|, may be,adjusted.

It will be apparent that the awl operating mechanism ofv the,illustrative machine comprises a number of ball joints Which'tend toprevent unduey wear and n oise and may readily be renewed.

A nailseparator lever, |35 (Figure 5) in the illustrative machine,corresponding t0 the lever referred to as the separator lever g3- in theabovementionedpatent, andhaving secured onit a nail separator |31-,similar.. tothegblade referred to as the separator blade gli?. in thatpatent. is pivoted on a stud |39; extending, laterally of the machineandsecured in theswinging head. The nail sepa'- rator lever. |35l has arearwardly extending arm |4| to which is pivotally connected, by auniversal coupling indicatedJ at |43, the' lower ndportion of a link|45. The. linkv |45 extends upwardly and its upper end portion isconnected by a universal joint, indicated at |41, to one varm |49 of abellcrank lever |5|. which is pivoted on a substantially horizontalstu'd |53 extending laterally of the machine and secured in tiieswingiighead. The other arm |55 of the bell-crank lever I5!i is connectedby .arearwardly Aextending two'- part rod |51 to a cam lever |59, similar tothe arm referred to as the arm 82 in United States Letters Patent No.1,859,421, granted May 24, 1932, on an application led in the i name ofReginald B. Woodcock, the arm being pivoted on the machine frame. Thecam lever |59 has on it a cam roll iti which engages a face cam |93corresponding to the cam referred to as the cam 60 in the last mentionedpatent, which is rotated half a revolution during each revolution of themain cam shaft 225 of the machine. In the illustrative machine, however,the cam |63 is so arranged that the separator operates to separate anail and deliver it beneath the driver in each cycle of the machine. Theaforesaid two-part rod 151 comprises one part having a ball-shaped endwhich engages the bottom of a recess in the cam lever |59 and anotherpart slidingly mounted in the rst part and having a ball-shaped endwhich engages the end of a screw E55 in the arm |55 of the bell-cranklever |i. A spring |91 on the two-p'art rod tends to separate the twoparts and to hold the ballshaped ends thereof respectively in the recessin the cam lever and against the screw in the bellcrank lever. A spring|99, corresponding to the spring referred to as the spring 'i5 in thelast mentioned patent, moves the separator forwardly to separate a nail,this movement of the separator being limited by the engagement of theseparator lever with a portion of the swinging head. When the earn is:moving the separator rearwardly the two-part link acts as a solidmember to move the separator and when the spring |69 is moving theseparator forwardly the spring on the two-part rod |81 expands the rodand holds the cam roll itl against a low part of the cam so that the camdoes not interfere with the forward movement of the separator.

The related operations of the above described awl and driver mechanismsare as follows: On rotation of the rockshaft |3| in a counterclockwisedirection, as viewed in Fig. 1, the link |23 is moved downward, therebyswinging the awl arm 65 downward and causing the awl 6| to pierce thework which rests on a suitable support, this `neing a horn in thepresent case. While the awl is down and in piercing engagement with thework, the swinging head is moved to the left of Fig. 1, thereby movingthrough the above described connections, namely the block ||5 and theplate ||3, the front end portion of the awl arm 95 laterally of themachine to feed the work. The lateral feed movement of the awl arm endswhen the awl hole made in the work by the awl is vertically alined withthe path of movement of the driver I. While then the work remainsstationary, the motion of the link |23 is reversed and thus the awl armS5 is moved upward, causing the awl 0| to be withdrawn from the work.Thereafter the head i i moves toward the right of Fig. 1 into itsinitial position, thereby returning the awl above the surface of thework into its initial pcsiticn from which its four-way motion wasinitiated. In the meantime a nail has been separated by the separatori3? and delivered beneath the driver l, whereupon the river,..after theawl has been rnoved out of the path of movement of the driver, isactuated by the crank 2| to descend and drive the nail into the awl holep-reviously made and located in vertical alinement with and beneath thedriver. The movement of the driver in descending is accelerated, asdescribed, by the action of the cam groove 29 on the cam roll 2l. Thereturn of the driver to its initial elevated position terminates onecycle of operations.

Having described my invention, what I claim as new and desire to secureby Letters Patent of the United States is:

1. In a fastener inserting machine, a fastener inserting driver, crankoperated mechanism for actuating the driver, and means cooperating withsaid mechanism for accelerating the driver when on its operativefastener inserting stroke.

2. In a fastener inserting machine, a work piercing awl, a fastenerinserting driver, a pivoted arm extending rearwardly in the machine andcarrying the awl at its forward end, means for moving said armheightwise and laterally of the machine to cause the awl to pierce andfeed the work, crank operated mechanism for actuating the driver in timerelation to the operation of the awl, and means cooperating with saidmechanism for accelerating the driver when on its operative fastenerinserting stroke.

FRANK BYCROFI KEALL.

REFERENCES CITED The following references are of record in the le ofthis patent:

UNITED STATES PATENTS Number Name Date 215,547 Turner May 20, 1879446,885 Pope Feb. 24, 1891 579,144 Gifford Mar. 23, 1897 798,594 BirggsSept. 5, 1905 1,309,566 Dobyne et al July 8, 1919 FOREIGN PATENTS NumberCountry Date 12,170 Great Britain May 27, 1907

